To mitchell



f E. R. KNIGHT -R 16,945 ummm mgl Qriginl Filed Dedf'f 1925 2Sheefs-Sheet 1 15in/en d OJ".

Reiasued Apr. 24, 1928.

UNITED STATES EDWARD B. KN'IGHT, 0l CARSON CITY,

Nirvana, assumes., BY imm asienm5, T0 MITCHELL SYRCIALTY COMPANY, 0FPHILADELPHIA, PENNSYLVANIA- auroinoran. THEM Loox,

rlzlnal lo. 1,588,529, dated August 81, 1926, Serial No. 73,759, ledDecember 1, 1925. 'Application for reissue led Harsh 10, 192B. SerialNo.260,693.

This invention relates to improvements in automobile theft locks, andhas particular reference to means for lookin an automobile against theftand to furt er cause an alarm to be given when an attempt is made tosteal the automobile.

Another object is to provide means whereby the lockingI mec anism isprotected againsttampering while in a locked position.

Another object is to provide means for locking the ignition system andthe hood protectn the engine.

A fnrier object is'to provide a device of this character which issimplein construction and therefore cheap to manufacture.

A still further object is to provide means which may be applied to anstandard make of automobile without altering the construction of thesame. k

Other objects and advantages will be apparent during the course of thefollowing escri tion.

In t e accompanying drawings forming a part of this specification, andin which like numerals are employed to designate likeparts throughoutthe same,

Figure 1 is, a fragmentary detail view showing a rtion of an automobilein crosssection an having my device applied thereao to` Fi 2 is avertical cross section taken on the line 2-2 of Figure 4;

Fi re 3 is a vertical cross section taken on the line 3-3fof Figure 4;85 Figure 4 is affront elevation of my device as the same would a theradiator toward t e dashboard;

Figure 5 is a fragmentary detail view showing the hood-lockingmechanism;

Figure 6' is a cross section taken on .the line 6-6 of Figure 5; re 7 isa cross sectional view of the Fi switc mechanism; and

Fi re 8 is a front plan view of the switch 46 as s own in Figure 2,looking from the drivers seat.

Applicant is aware of the fact that many forms of automobile locks havebeen placed upon cars, the same locking the igiiition and 5otransmission and other parts of t e automobile independently. Applicanthas devised a lock which automatically breaks the ignition circuit tothe distributor, also automatically locks the hood of the automobileagainst bepear in looking from.

ing raised thereby precluding thethief gettingto the engine, and alsoautomatically manipulating a switch whereby should a thief attempt toplace a wire around the customary lock an alarm would be given. In theaccompanying drawings, wherein for the purpose .of illustration is Showna preferred embodiment of my invention, the numeral 5 designates theframe lof an automobile, the numeral 6 the dash thereof, 7 the radiatorand 8 the hood, while at 9 is shown the customary instrument board.

Between the instrument board 9 and the dash-board 6 is a tubular member11 which is free to rot-ate on bearing members 12 and 13. Within thistubular member 11 is a second tubular member 14 which is secured to thebearing members l'12 and 13 and also to a nut 16 securedv to the uppersurface of the dash-board 6. The result of the strncture thusfardescribed is that should a thief place a wrench upon the tubular member11 the same would rotate and therefore he could not in any manner turnthe locking mechanism. The locking mechanism proper consists of theordinary cylinder lock 17 operated by a key 18. When turned thisvcylinder lock 17 is adapted to rotate a shaft 19 having a squared end 21upon which a plate 22 is secured. This plate 22 has raised outwardlytherefrom a cam track 23 within which a roller 24 is positioned. Thisroller 24 is mounted upon a slider 26 slidably positioned in a slot 27formed in a plate 28 which is secured to the dash-board 6 as by lugs 29.

A cross piece 31 is securedto the slider 26 and has extendingtherefromwires 32 and 33. These wires pass through tubular shells 34 and 36 andare commonly known as Bowden wires.

Referring now to Figures 1 and 5, it will be noted that the shell 36 issecured to the tubular portion v37 of a bifurcated bracket 38, whichbracket issecured to the frame 5 of the automobile.

Attached to the hood 8 is an arm 39 which is adapted to lie between thebifurcated` portions of the bracket 38 when the hood 8 is in a closedposition. This arm 39 has an 'opening therethrough which coincides withopenings formed in the bracket 38 which permits a pin 41 secured to theend of the wire 33 to be projected from the tubular member 37, throughthe arinl 39, thereby .and that the wires 32 and 33 terior cam 42, whichis adapted to contact a roller 43 mounted upon the end of an arm 'timeprotected 44. This arm 44 carries a'wiping contact 46 which contacts ablock 47 at all times, and when in its lowermost position, as shown inFigure 7, contacts a block 48. A block 49 is positionedin alignment withthe block 48, so that when the arm 44 is raised the wiper 46 will moveinto contact with the block 49. The block 49 is connected b a wire 51 toa suitable alarm, such as the horn of the machine. The block 48 isconnected by a wire 52 to the distributor of the car, and the block 47is connected'by a vwire 53'to the customary switch of the car.

The result of the structure thus far described is that whenthe key 18 isplaced in the lock 17 and rotated so as to unlock the device, the handle54 may be moved to one of three positions, desi ated by the numerals 1,2 and 3, of igure 8. When in the position of the numeral 1, the partsare in the position shown in Figure 4, the result bein that the hood 8may'be raised if desiret?,r or 'the car may' be driven.v When moved tothe position of the numeral 2 of Figure 8, the result will be that thecam plate 22 will have been given a partial rotation, as indicated bythe arrowof Figure 4, which rotation will push vdown on the Bowden wides32 and 33, the 'cross piece 31, sliderl 28 and roller` 24, with theresult that the pins 41 will be moved to their dotted line position ofFigure 5, thus locking the hood 8 against being raised. Furthermanipulation of the handle 54 to the position 3 of Figure 8 will resultin the cam 42 contacting the lever 43, thus moving the arm 44 upwardlyas indicated by the arrow thereabove in Figure 4, resulting in the wiper46 moving from the block 48 to the block 49 and thus breaking thecircuit to the distributor of theengine, thereby preventing the enginefrom being started and further conipleting the circuit to the horn.nAccordingly, should an unauthorized person attempt to bridge around thecustomary switch of the car, he will of necessity complete the circuitto -the horn and give an audible signal. It will thus be seen that -amachine equipped Awith my device is entirely protected against tamperingand at the same against operation by an unauthorized person.

It is to be understood that the form of my invention herewith shown anddescribed is to be taken as a preferred example of the ltions b same,and that various changes in the'shape,

locking' mechanism thereon, said. locking mechanism comprising arotatable member, a cam secured thereto, a roller adapted to be actuatedVby said cam, a slider secured to said roller, a pair of wires securedto said slider and extendinur to aremote int for the purpose of loc gthe hoo of said automobile when said rotatable member is moved. 2. Incombination with an automobile, a locking mechanism comprising akey-actuated lock, a rod secured thereto and adapted to be rotatedthereby, a plate secured to said Y rod, a cam formed in said plate, asecond cam formed on the edg first mentioned -cam bein ate a pair ofpins locate on said automobile.

3.. In combination with an automobile having a hood and an Vi itionsystem, a locking mechanism theregoli comp a key-actuated lock, a rodsecured thereto, a tubular housing surrounding said rod and being freeto rotate thereabout, a plate secured to said rod and adapted to bemoved thereby, a cam formed on said ond cam formed on the edge o saidlate, a roller adapted to be engaged by sai first mentioned cam, aslider secured to said roller a pair of wires secured to said slider, abolt secured to the opposite end of each of said wires, each of saidbolts be' positioned in the tubular portion of dnracket positionedadjacent the hood of said auto.- mobile, an arm secured to the hood ofsaid automobile and adapted to be said bolt a contact mechanism haralityof contacts, a wiper adapt-: moved over said contacts, an arm saidwi r, a roller secured to said arm, said ro er being adapted to beactuated by siid second mentioned `cam formed on said p ate. Y

h 4. In combination with im automollilile avmg anv ignition system, aockin' g mec anism therefor, said locking mechanism comprising akey-actuated lock, a cam secured thereto, a wire actuated in oppositedirecsalild cam, Aexteidilng d Aint or t e purpose o oclung' an unockingan essential part of the automobile when said locking mechanism isselectively 5. In combination with an automobile, a

adapted to actua pluto be .locking mechanism thereon, said lockingmechamsm comprising a rotatable member, a cam secured thereto, awire'tctuated in e of said plate, said at a remote point iin securedto"v iis to a remote ufo 10 locking mechanism comprising a rotatablemember, a. cam secured thereto, a wire actuated in opposite directionsby said cam extending to a remote oint for the purpose of locking andunloc ing an essential part of the automobile, said wire beingreciprocated by the rotation of said cam, of an ignition system having aplurality of contacts adapted to be o ened and closed as and when saidrotata 1e member is moved.

EDWARD R. KNIGHT.

